> I am currently working on a project which is about the ground-coupled heat > exchanger model. The model is used to simulate the heat transfer process of > surrounding soil of the circular pipe, where heat is extracted or generated > within the circular pipe. I will need to write a code (in C++) to simulate > the transient heat transfer for the pipe (i.e. circular cylindrical) within > soil (i.e. rectangular domain model).
While you can write a code in C++ for this, you don't really need to; several serviceable C++ codes for the solving the heat equation, are freely available. Try GetDP, FreeFem++, OpenFOAM, or libMesh, for example; the first of these enjoys close links with Gmsh. > (1) After the mesh has been generated, can I read or view the mesh > code/source coordinate data? Yes. The 110404_Model in msh.msh file you generated and included in the zip-archive is in an ASCII format, so you can read it yourself in a text-editor (e.g. Emacs or vi) or parse it fairly easily in any programming language. The format is simple and is described in the manual: http://geuz.org/gmsh/doc/texinfo/gmsh.html#MSH-ASCII-file-format > (2) Once I have got the mesh code/source coordinate data, how would I be able > to transfer or link these data into my C++ program? If you do decide to go this way, you'll find an example of reading a Gmsh geometry .geo file, meshing it, and processing the resulting mesh in utils/api_demos/mainSimple.cpp in the Gmsh source distribution. > As mentioned, I will be using transient heat transfer equation in cylindrical > polar coordinate system to determine the heat transfer effect of the circular > pipe. The equation shows as below: You may well be better off working with the equation in the Cartesian coordinate system, despite the circular pipe. It's much easier to generate an unstructured mesh than a structured one which respects the coordinate system, and once you've done that, I think you've lost whatever advantages a special coordinate system might have. > Another thing is that, I have downloaded the Gmsh 2.5.0 Source Code from your > website, and I am wondering how I shall read this source code, and whether I > can link/use one of the codes into my simulation model (or mesh model) from > the Source Code? You probably don't need to read the Gmsh source code, except out of curiosity or if you find later you need to fix or bug or extend the program, but Gmsh is already in a sufficiently mature state that you shouldn't need to for solving the heat equation in a reasonably well-defined geometry. But don't let me discourage you: see the other examples in utils/api_demos. _______________________________________________ gmsh mailing list [email protected] http://www.geuz.org/mailman/listinfo/gmsh
